Statewide Rankings

Statewide Data Info
Please note, Degree Days and Palmer Indices are not available for Alaska. Palmer Drought Severity Index (PDSI), Palmer Hydrological Drought Index (PHDI), and Palmer Modified Drought Index (PMDI) are not offered for multiple-month time scales.

Pennsylvania

Precipitation Rankings, May 1937

View Period (Months):
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  • Record Driest
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
May 1937
1-Month
3.47"
(88.14mm)
3.93"
(99.82mm)
-0.46"
(-11.68mm)
52nd Driest
Driest since:
1964
77th Wettest
Wettest since:
1989
Ties: 1954, 1970, 2020
Apr–May 1937
2-Month
9.08"
(230.63mm)
7.57"
(192.28mm)
1.51"
(38.35mm)
100th Driest
Driest since:
1926
29th Wettest
Wettest since:
2011
Ties: 1931
Mar–May 1937
3-Month
11.02"
(279.91mm)
11.06"
(280.92mm)
-0.04"
(-1.01mm)
70th Driest
Driest since:
1926
59th Wettest
Wettest since:
2011
Ties: 1979
Feb–May 1937
4-Month
13.44"
(341.38mm)
13.66"
(346.96mm)
-0.22"
(-5.58mm)
60th Driest
Driest since:
1941
69th Wettest
Wettest since:
2011
Jan–May 1937
5-Month
19.88"
(504.95mm)
16.71"
(424.43mm)
3.17"
(80.52mm)
113th Driest
Driest since:
1941
16th Wettest
Wettest since:
2011
Dec 1936–May 1937
6-Month
23.90"
(607.06mm)
19.81"
(503.17mm)
4.09"
(103.89mm)
117th Driest
Driest since:
1941
11th Wettest
Wettest since:
2011
Nov 1936–May 1937
7-Month
26.56"
(674.62mm)
23.02"
(584.71mm)
3.54"
(89.91mm)
109th Driest
Driest since:
1934
19th Wettest
Wettest since:
1952
Oct 1936–May 1937
8-Month
30.53"
(775.46mm)
26.19"
(665.23mm)
4.34"
(110.23mm)
109th Driest
Driest since:
1925
19th Wettest
Wettest since:
2011
Sep 1936–May 1937
9-Month
32.67"
(829.82mm)
29.75"
(755.65mm)
2.92"
(74.17mm)
91st Driest
Driest since:
1941
37th Wettest
Wettest since:
2019
Aug 1936–May 1937
10-Month
37.76"
(959.10mm)
33.62"
(853.95mm)
4.14"
(105.15mm)
105th Driest
Driest since:
1931
23rd Wettest
Wettest since:
2019
Ties: 1928
Jul 1936–May 1937
11-Month
40.64"
(1,032.26mm)
37.82"
(960.63mm)
2.82"
(71.63mm)
88th Driest
Driest since:
1931
40th Wettest
Wettest since:
2019
Jun 1936–May 1937
12-Month
44.46"
(1,129.28mm)
41.97"
(1,066.04mm)
2.49"
(63.24mm)
85th Driest
Driest since:
1931
43rd Wettest
Wettest since:
2019
Dec 1935–May 1937
18-Month
65.96"
(1,675.38mm)
61.76"
(1,568.70mm)
4.20"
(106.68mm)
93rd Driest
Driest since:
1931
34th Wettest
Wettest since:
2019
Jun 1935–May 1937
24-Month
89.46"
(2,272.28mm)
83.91"
(2,131.31mm)
5.55"
(140.97mm)
96th Driest
Driest since:
1931
31st Wettest
Wettest since:
2019
Jun 1934–May 1937
36-Month
130.23"
(3,307.84mm)
125.93"
(3,198.62mm)
4.30"
(109.22mm)
79th Driest
Driest since:
1965
47th Wettest
Wettest since:
2020
Jun 1933–May 1937
48-Month
167.82"
(4,262.63mm)
167.92"
(4,265.17mm)
-0.10"
(-2.54mm)
51st Driest
Driest since:
1966
74th Wettest
Wettest since:
2020
Jun 1932–May 1937
60-Month
210.60"
(5,349.24mm)
209.84"
(5,329.94mm)
0.76"
(19.30mm)
53rd Driest
Driest since:
1967
71st Wettest
Wettest since:
2022

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